Actuator control system
AssigneeSMC Corporation
InventorsShigekazu Nagai, Akio Saitoh, Toru Sugiyama, Ryuichi Masui, Takeshi Hirose, Masaki Miyahara
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Abstract
An actuator control system comprises an electric actuator, a driver, and a controller. The electric actuator is provided with a buffering mechanism which absorbs impact applied to a piston rod. The buffering mechanism includes piston dampers which absorb impact applied to a piston, a first end damper which is provided at an end of a housing facing the piston, and a second end damper which is provided on a rod cover separated from the housing by a predetermined distance.
Claims8
An actuator control system comprising an electric actuator which has a displacement member displaced by a rotary driving force of a rotary driving source transmitted via a driving force-transmitting shaft, and a control unit which is provided for said electric actuator, wherein
- said electric actuator is provided with a buffering mechanism which absorbs impact applied to said displacement member;
- and
- said control unit comprises current-detecting means which detects a current supplied to said rotary driving source, comparing means which compares a detection signal from said current-detecting means with a preset reference current, and current-limiting means which, without cutting off supply of said current to said rotary driving source, limits said current so that said current supplied to said rotary driving source does not exceed said reference current when a load is applied to said rotary driving source while maintaining an energized state and a drive shaft of said rotary driving source is stopped to give a restricted state.
Dependencies are inferred from the claim text.